Internal Network Penetration Testing

What Is Internal Penetration Testing?

Internal penetration testing simulates a threat actor who has already gained access to your internal network — whether through a phishing attack, stolen credentials, a compromised remote connection, or a malicious insider. Our engineers connect directly to your internal environment and attempt to enumerate systems, exploit weaknesses, escalate privileges, and access sensitive data.

Why Internal Testing Reveals the Most Severe Findings

Many organizations invest heavily in perimeter security but leave their internal networks comparatively flat and unprotected. Once inside, an attacker often finds few barriers between a standard workstation and highly sensitive assets like domain controllers, file servers, databases, and financial systems. Internal tests regularly uncover misconfigurations, unpatched systems, overly permissive access controls, and lateral movement paths that would allow an attacker to compromise an entire domain from a single initial foothold.

What Internal Testing Covers

• Active Directory enumeration and privilege escalation
• Lateral movement and credential harvesting
• Internal network segmentation assessment
• Unpatched or misconfigured internal services
• Access to sensitive data, shares, and databases
• Detection and response testing — how long before your team notices?